# Description

Fixes docstring in Articulation data, where rigid body properties should
be of dimension (num_instances, num_bodies, x) instead of
(num_instances, 1, x).

Fixes #1651

<!-- As a practice, it is recommended to open an issue to have
discussions on the proposed pull request.
This makes it easier for the community to keep track of what is being
developed or added, and if a given feature
is demanded by more than one party. -->

## Type of change

docstring fix.

- Bug fix (non-breaking change which fixes an issue)

**Before Change**

for the data
'''
body_link_pos_w
body_link_quat_w
body_link_vel_w
body_link_lin_vel_w
body_link_ang_vel_w
body_com_pos_w
body_com_quat_w
body_com_vel_w
body_com_lin_vel_w
body_com_ang_vel_w
'''

The actual dimension are (num_instances, num_bodies, x),

 but the docstring says (num_instances, 1, x)

**After Change**

docstring says (num_instances, num_bodies, x)


## Checklist

- [ ] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [x] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

<!--
As you go through the checklist above, you can mark something as done by
putting an x character in it

For example,
- [x] I have done this task
- [ ] I have not done this task
-->

---------
Signed-off-by: Kelly Guo <kellyguo123@hotmail.com>
Co-authored-by: Kelly Guo <kellyguo123@hotmail.com>
Co-authored-by: James Tigue <166445701+jtigue-bdai@users.noreply.github.com>
Co-authored-by: Kelly Guo <kellyg@nvidia.com>